1 // Created on: 2012-01-26
2 // Created by: Kirill GAVRILOV
3 // Copyright (c) 2012-2014 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
7 // This library is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU Lesser General Public License version 2.1 as published
9 // by the Free Software Foundation, with special exception defined in the file
10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
11 // distribution for complete text of the license and disclaimer of any warranty.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
20 #include <OpenGl_Context.hxx>
22 #include <OpenGl_ArbTBO.hxx>
23 #include <OpenGl_ArbIns.hxx>
24 #include <OpenGl_ArbDbg.hxx>
25 #include <OpenGl_ArbFBO.hxx>
26 #include <OpenGl_ExtGS.hxx>
27 #include <OpenGl_ArbTexBindless.hxx>
28 #include <OpenGl_GlCore44.hxx>
29 #include <OpenGl_FrameBuffer.hxx>
30 #include <OpenGl_Sampler.hxx>
31 #include <OpenGl_ShaderManager.hxx>
32 #include <Graphic3d_TransformUtils.hxx>
34 #include <Message_Messenger.hxx>
36 #include <NCollection_Vector.hxx>
38 #include <Standard_ProgramError.hxx>
43 #pragma comment(lib, "libEGL.lib")
47 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
49 #if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
52 #include <OpenGL/OpenGL.h>
55 #include <GL/glx.h> // glXGetProcAddress()
61 #pragma comment (lib, "gl2ps.lib")
68 static const Handle(OpenGl_Resource) NULL_GL_RESOURCE;
71 // =======================================================================
72 // function : OpenGl_Context
74 // =======================================================================
75 OpenGl_Context::OpenGl_Context (const Handle(OpenGl_Caps)& theCaps)
94 caps (!theCaps.IsNull() ? theCaps : new OpenGl_Caps()),
95 #if defined(GL_ES_VERSION_2_0)
96 hasHighp (Standard_False),
97 hasUintIndex(Standard_False),
98 hasTexRGBA8(Standard_False),
100 hasHighp (Standard_True),
101 hasUintIndex(Standard_True),
102 hasTexRGBA8(Standard_True),
104 arbNPTW (Standard_False),
105 arbTexRG (Standard_False),
106 arbTexBindless (NULL),
108 arbTboRGB32 (Standard_False),
114 extBgra(Standard_False),
115 extAnis(Standard_False),
116 extPDS (Standard_False),
117 atiMem (Standard_False),
118 nvxMem (Standard_False),
119 mySharedResources (new OpenGl_ResourcesMap()),
120 myDelayed (new OpenGl_DelayReleaseMap()),
121 myUnusedResources (new OpenGl_ResourcesStack()),
123 myGlLibHandle (NULL),
124 myFuncs (new OpenGl_GlFunctions()),
126 myTexClamp (GL_CLAMP_TO_EDGE),
131 myIsInitialized (Standard_False),
132 myIsStereoBuffers (Standard_False),
133 myIsGlNormalizeEnabled (Standard_False),
134 #if !defined(GL_ES_VERSION_2_0)
135 myRenderMode (GL_RENDER),
142 myIsGlDebugCtx (Standard_False)
144 // system-dependent fields
145 #if defined(HAVE_EGL)
146 myDisplay = (Aspect_Display )EGL_NO_DISPLAY;
147 myWindow = (Aspect_Drawable )EGL_NO_SURFACE;
148 myGContext = (Aspect_RenderingContext )EGL_NO_CONTEXT;
149 #elif defined(_WIN32)
153 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
154 // Vendors can not extend functionality on this system
155 // and developers are limited to OpenGL support provided by Mac OS X SDK.
156 // We retrieve function pointers from system library
157 // to generalize extensions support on all platforms.
158 // In this way we also reach binary compatibility benefit between OS releases
159 // if some newest functionality is optionally used.
160 // Notice that GL version / extension availability checks are required
161 // because function pointers may be available but not functionality itself
162 // (depends on renderer).
163 #if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
165 myGlLibHandle = dlopen ("/System/Library/Frameworks/OpenGLES.framework/OpenGLES", RTLD_LAZY);
168 myGlLibHandle = dlopen ("/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL", RTLD_LAZY);
176 memset (myFuncs.operator->(), 0, sizeof(OpenGl_GlFunctions));
177 myShaderManager = new OpenGl_ShaderManager (this);
180 // =======================================================================
181 // function : ~OpenGl_Context
183 // =======================================================================
184 OpenGl_Context::~OpenGl_Context()
186 // release clean up queue
189 #if !defined(GL_ES_VERSION_2_0)
190 // release default VAO
191 if (myDefaultVao != 0
195 core32->glDeleteVertexArrays (1, &myDefaultVao);
200 // release default FBO
201 if (!myDefaultFbo.IsNull())
203 myDefaultFbo->Release (this);
204 myDefaultFbo.Nullify();
207 // release shared resources if any
208 if (((const Handle(Standard_Transient)& )mySharedResources)->GetRefCount() <= 1)
210 myShaderManager.Nullify();
211 for (NCollection_DataMap<TCollection_AsciiString, Handle(OpenGl_Resource)>::Iterator anIter (*mySharedResources);
212 anIter.More(); anIter.Next())
214 anIter.Value()->Release (this);
217 // release delayed resources added during deletion of shared resources
218 while (!myUnusedResources->IsEmpty())
220 myUnusedResources->First()->Release (this);
221 myUnusedResources->RemoveFirst();
224 else if (myShaderManager->IsSameContext (this))
226 myShaderManager->SetContext (NULL);
228 mySharedResources.Nullify();
231 // release sampler object
232 if (!myTexSampler.IsNull())
234 myTexSampler->Release (this);
237 #if !defined(GL_ES_VERSION_2_0)
244 glGetPointerv (GL_DEBUG_CALLBACK_USER_PARAM_ARB, &aPtr);
247 arbDbg->glDebugMessageCallbackARB (NULL, NULL);
249 myIsGlDebugCtx = Standard_False;
254 // =======================================================================
255 // function : forcedRelease
257 // =======================================================================
258 void OpenGl_Context::forcedRelease()
261 for (NCollection_DataMap<TCollection_AsciiString, Handle(OpenGl_Resource)>::Iterator anIter (*mySharedResources);
262 anIter.More(); anIter.Next())
264 anIter.Value()->Release (this);
266 mySharedResources->Clear();
267 myShaderManager->clear();
268 myShaderManager->SetContext (NULL);
270 // release delayed resources added during deletion of shared resources
271 while (!myUnusedResources->IsEmpty())
273 myUnusedResources->First()->Release (this);
274 myUnusedResources->RemoveFirst();
278 // =======================================================================
279 // function : MaxDegreeOfAnisotropy
281 // =======================================================================
282 Standard_Integer OpenGl_Context::MaxDegreeOfAnisotropy() const
287 // =======================================================================
288 // function : MaxTextureSize
290 // =======================================================================
291 Standard_Integer OpenGl_Context::MaxTextureSize() const
296 // =======================================================================
297 // function : MaxClipPlanes
299 // =======================================================================
300 Standard_Integer OpenGl_Context::MaxClipPlanes() const
302 return myMaxClipPlanes;
305 #if !defined(GL_ES_VERSION_2_0)
306 inline Standard_Integer stereoToMonoBuffer (const Standard_Integer theBuffer)
322 // =======================================================================
323 // function : SetReadBuffer
325 // =======================================================================
326 void OpenGl_Context::SetReadBuffer (const Standard_Integer theReadBuffer)
328 #if !defined(GL_ES_VERSION_2_0)
329 myReadBuffer = !myIsStereoBuffers ? stereoToMonoBuffer (theReadBuffer) : theReadBuffer;
330 if (myReadBuffer < GL_COLOR_ATTACHMENT0
333 arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, OpenGl_FrameBuffer::NO_FRAMEBUFFER);
335 ::glReadBuffer (myReadBuffer);
337 (void )theReadBuffer;
341 // =======================================================================
342 // function : SetDrawBuffer
344 // =======================================================================
345 void OpenGl_Context::SetDrawBuffer (const Standard_Integer theDrawBuffer)
347 #if !defined(GL_ES_VERSION_2_0)
348 myDrawBuffer = !myIsStereoBuffers ? stereoToMonoBuffer (theDrawBuffer) : theDrawBuffer;
349 if (myDrawBuffer < GL_COLOR_ATTACHMENT0
352 arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, OpenGl_FrameBuffer::NO_FRAMEBUFFER);
354 ::glDrawBuffer (myDrawBuffer);
356 (void )theDrawBuffer;
360 // =======================================================================
361 // function : FetchState
363 // =======================================================================
364 void OpenGl_Context::FetchState()
366 #if !defined(GL_ES_VERSION_2_0)
367 // cache feedback mode state
370 ::glGetIntegerv (GL_RENDER_MODE, &myRenderMode);
373 // cache buffers state
374 ::glGetIntegerv (GL_READ_BUFFER, &myReadBuffer);
375 ::glGetIntegerv (GL_DRAW_BUFFER, &myDrawBuffer);
379 // =======================================================================
382 // =======================================================================
383 void OpenGl_Context::Share (const Handle(OpenGl_Context)& theShareCtx)
385 if (!theShareCtx.IsNull())
387 mySharedResources = theShareCtx->mySharedResources;
388 myDelayed = theShareCtx->myDelayed;
389 myUnusedResources = theShareCtx->myUnusedResources;
390 myShaderManager = theShareCtx->myShaderManager;
394 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
396 // =======================================================================
397 // function : IsCurrent
399 // =======================================================================
400 Standard_Boolean OpenGl_Context::IsCurrent() const
402 #if defined(HAVE_EGL)
403 if ((EGLDisplay )myDisplay == EGL_NO_DISPLAY
404 || (EGLSurface )myWindow == EGL_NO_SURFACE
405 || (EGLContext )myGContext == EGL_NO_CONTEXT)
407 return Standard_False;
410 return (((EGLDisplay )myDisplay == eglGetCurrentDisplay())
411 && ((EGLContext )myGContext == eglGetCurrentContext())
412 && ((EGLSurface )myWindow == eglGetCurrentSurface (EGL_DRAW)));
413 #elif defined(_WIN32)
414 if (myWindowDC == NULL || myGContext == NULL)
416 return Standard_False;
418 return (( (HDC )myWindowDC == wglGetCurrentDC())
419 && ((HGLRC )myGContext == wglGetCurrentContext()));
421 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
423 return Standard_False;
426 return ( ((Display* )myDisplay == glXGetCurrentDisplay())
427 && ((GLXContext )myGContext == glXGetCurrentContext())
428 && ((GLXDrawable )myWindow == glXGetCurrentDrawable()));
432 // =======================================================================
433 // function : MakeCurrent
435 // =======================================================================
436 Standard_Boolean OpenGl_Context::MakeCurrent()
438 #if defined(HAVE_EGL)
439 if ((EGLDisplay )myDisplay == EGL_NO_DISPLAY
440 || (EGLSurface )myWindow == EGL_NO_SURFACE
441 || (EGLContext )myGContext == EGL_NO_CONTEXT)
443 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
444 return Standard_False;
447 if (eglMakeCurrent ((EGLDisplay )myDisplay, (EGLSurface )myWindow, (EGLSurface )myWindow, (EGLContext )myGContext) != EGL_TRUE)
449 // if there is no current context it might be impossible to use glGetError() correctly
450 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB,
451 "eglMakeCurrent() has failed!");
452 myIsInitialized = Standard_False;
453 return Standard_False;
455 #elif defined(_WIN32)
456 if (myWindowDC == NULL || myGContext == NULL)
458 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
459 return Standard_False;
462 // technically it should be safe to activate already bound GL context
463 // however some drivers (Intel etc.) may FAIL doing this for unknown reason
466 myShaderManager->SetContext (this);
467 return Standard_True;
469 else if (wglMakeCurrent ((HDC )myWindowDC, (HGLRC )myGContext) != TRUE)
471 // notice that glGetError() couldn't be used here!
472 wchar_t* aMsgBuff = NULL;
473 DWORD anErrorCode = GetLastError();
474 FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
475 NULL, anErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (wchar_t* )&aMsgBuff, 0, NULL);
476 TCollection_ExtendedString aMsg ("wglMakeCurrent() has failed. ");
477 if (aMsgBuff != NULL)
479 aMsg += (Standard_ExtString )aMsgBuff;
480 LocalFree (aMsgBuff);
482 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, (unsigned int )anErrorCode, GL_DEBUG_SEVERITY_HIGH_ARB, aMsg);
483 myIsInitialized = Standard_False;
484 return Standard_False;
487 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
489 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
490 return Standard_False;
493 if (!glXMakeCurrent ((Display* )myDisplay, (GLXDrawable )myWindow, (GLXContext )myGContext))
495 // if there is no current context it might be impossible to use glGetError() correctly
496 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB,
497 "glXMakeCurrent() has failed!");
498 myIsInitialized = Standard_False;
499 return Standard_False;
502 myShaderManager->SetContext (this);
503 return Standard_True;
506 // =======================================================================
507 // function : SwapBuffers
509 // =======================================================================
510 void OpenGl_Context::SwapBuffers()
512 #if defined(HAVE_EGL)
513 if ((EGLSurface )myWindow != EGL_NO_SURFACE)
515 eglSwapBuffers ((EGLDisplay )myDisplay, (EGLSurface )myWindow);
517 #elif defined(_WIN32)
518 if ((HDC )myWindowDC != NULL)
520 ::SwapBuffers ((HDC )myWindowDC);
524 if ((Display* )myDisplay != NULL)
526 glXSwapBuffers ((Display* )myDisplay, (GLXDrawable )myWindow);
533 // =======================================================================
534 // function : SetSwapInterval
536 // =======================================================================
537 Standard_Boolean OpenGl_Context::SetSwapInterval (const Standard_Integer theInterval)
539 #if defined(HAVE_EGL)
540 if (::eglSwapInterval ((EGLDisplay )myDisplay, theInterval) == EGL_TRUE)
542 return Standard_True;
544 #elif defined(_WIN32)
545 if (myFuncs->wglSwapIntervalEXT != NULL)
547 myFuncs->wglSwapIntervalEXT (theInterval);
548 return Standard_True;
550 #elif defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
552 #elif defined(__APPLE__)
553 if (::CGLSetParameter (CGLGetCurrentContext(), kCGLCPSwapInterval, &theInterval) == kCGLNoError)
555 return Standard_True;
558 if (theInterval == -1
559 && myFuncs->glXSwapIntervalEXT != NULL)
561 typedef int (*glXSwapIntervalEXT_t_x)(Display* theDisplay, GLXDrawable theDrawable, int theInterval);
562 glXSwapIntervalEXT_t_x aFuncPtr = (glXSwapIntervalEXT_t_x )myFuncs->glXSwapIntervalEXT;
563 aFuncPtr ((Display* )myDisplay, (GLXDrawable )myWindow, theInterval);
564 return Standard_True;
566 else if (myFuncs->glXSwapIntervalSGI != NULL)
568 myFuncs->glXSwapIntervalSGI (theInterval);
569 return Standard_True;
572 return Standard_False;
575 // =======================================================================
576 // function : findProc
578 // =======================================================================
579 void* OpenGl_Context::findProc (const char* theFuncName)
581 #if defined(HAVE_EGL)
582 return (void* )eglGetProcAddress (theFuncName);
583 #elif defined(_WIN32)
584 return wglGetProcAddress (theFuncName);
585 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
586 return (myGlLibHandle != NULL) ? dlsym (myGlLibHandle, theFuncName) : NULL;
588 return (void* )glXGetProcAddress ((const GLubyte* )theFuncName);
592 // =======================================================================
593 // function : CheckExtension
595 // =======================================================================
596 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtName) const
598 if (theExtName == NULL)
601 std::cerr << "CheckExtension called with NULL string!\n";
603 return Standard_False;
606 #if !defined(GL_ES_VERSION_2_0)
607 // available since OpenGL 3.0
608 // and the ONLY way to check extensions with OpenGL 3.1+ core profile
609 if (IsGlGreaterEqual (3, 0)
610 && myFuncs->glGetStringi != NULL)
613 ::glGetIntegerv (GL_NUM_EXTENSIONS, &anExtNb);
614 const size_t anExtNameLen = strlen (theExtName);
615 for (GLint anIter = 0; anIter < anExtNb; ++anIter)
617 const char* anExtension = (const char* )myFuncs->glGetStringi (GL_EXTENSIONS, (GLuint )anIter);
618 const size_t aTestExtNameLen = strlen (anExtension);
619 if (aTestExtNameLen == anExtNameLen
620 && strncmp (anExtension, theExtName, anExtNameLen) == 0)
622 return Standard_True;
625 return Standard_False;
629 // use old way with huge string for all extensions
630 const char* anExtString = (const char* )glGetString (GL_EXTENSIONS);
631 if (anExtString == NULL)
633 Messenger()->Send ("TKOpenGL: glGetString (GL_EXTENSIONS) has returned NULL! No GL context?", Message_Warning);
634 return Standard_False;
636 return CheckExtension (anExtString, theExtName);
639 // =======================================================================
640 // function : CheckExtension
642 // =======================================================================
643 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtString,
644 const char* theExtName)
646 if (theExtString == NULL)
648 return Standard_False;
651 // Search for theExtName in the extensions string.
652 // Use of strstr() is not sufficient because extension names can be prefixes of other extension names.
653 char* aPtrIter = (char* )theExtString;
654 const char* aPtrEnd = aPtrIter + strlen (theExtString);
655 const size_t anExtNameLen = strlen (theExtName);
656 while (aPtrIter < aPtrEnd)
658 const size_t n = strcspn (aPtrIter, " ");
659 if ((n == anExtNameLen) && (strncmp (aPtrIter, theExtName, anExtNameLen) == 0))
661 return Standard_True;
665 return Standard_False;
668 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
670 // =======================================================================
673 // =======================================================================
674 Standard_Boolean OpenGl_Context::Init (const Standard_Boolean theIsCoreProfile)
678 return Standard_True;
681 #if defined(HAVE_EGL)
682 myDisplay = (Aspect_Display )eglGetCurrentDisplay();
683 myGContext = (Aspect_RenderingContext )eglGetCurrentContext();
684 myWindow = (Aspect_Drawable )eglGetCurrentSurface(EGL_DRAW);
685 #elif defined(_WIN32)
686 myWindowDC = (Aspect_Handle )wglGetCurrentDC();
687 myGContext = (Aspect_RenderingContext )wglGetCurrentContext();
689 myDisplay = (Aspect_Display )glXGetCurrentDisplay();
690 myGContext = (Aspect_RenderingContext )glXGetCurrentContext();
691 myWindow = (Aspect_Drawable )glXGetCurrentDrawable();
693 if (myGContext == NULL)
695 return Standard_False;
698 init (theIsCoreProfile);
699 myIsInitialized = Standard_True;
700 return Standard_True;
705 // =======================================================================
708 // =======================================================================
709 #if defined(HAVE_EGL)
710 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theEglSurface,
711 const Aspect_Display theEglDisplay,
712 const Aspect_RenderingContext theEglContext,
713 const Standard_Boolean theIsCoreProfile)
714 #elif defined(_WIN32)
715 Standard_Boolean OpenGl_Context::Init (const Aspect_Handle theWindow,
716 const Aspect_Handle theWindowDC,
717 const Aspect_RenderingContext theGContext,
718 const Standard_Boolean theIsCoreProfile)
719 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
721 #if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
722 Standard_Boolean OpenGl_Context::Init (EAGLContext* theGContext,
723 const Standard_Boolean theIsCoreProfile)
725 Standard_Boolean OpenGl_Context::Init (NSOpenGLContext* theGContext,
726 const Standard_Boolean theIsCoreProfile)
730 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theWindow,
731 const Aspect_Display theDisplay,
732 const Aspect_RenderingContext theGContext,
733 const Standard_Boolean theIsCoreProfile)
736 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called only once!");
737 #if defined(HAVE_EGL)
738 myWindow = theEglSurface;
739 myGContext = theEglContext;
740 myDisplay = theEglDisplay;
741 #elif defined(_WIN32)
742 myWindow = theWindow;
743 myGContext = theGContext;
744 myWindowDC = theWindowDC;
745 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
746 myGContext = theGContext;
748 myWindow = theWindow;
749 myGContext = theGContext;
750 myDisplay = theDisplay;
752 if (myGContext == NULL || !MakeCurrent())
754 return Standard_False;
757 init (theIsCoreProfile);
758 myIsInitialized = Standard_True;
759 return Standard_True;
762 // =======================================================================
763 // function : ResetErrors
765 // =======================================================================
766 void OpenGl_Context::ResetErrors()
768 while (glGetError() != GL_NO_ERROR)
774 // =======================================================================
775 // function : ReadGlVersion
777 // =======================================================================
778 void OpenGl_Context::ReadGlVersion (Standard_Integer& theGlVerMajor,
779 Standard_Integer& theGlVerMinor)
785 #ifdef GL_MAJOR_VERSION
786 // available since OpenGL 3.0 and OpenGL 3.0 ES
787 GLint aMajor = 0, aMinor = 0;
788 glGetIntegerv (GL_MAJOR_VERSION, &aMajor);
789 glGetIntegerv (GL_MINOR_VERSION, &aMinor);
790 // glGetError() sometimes does not report an error here even if
791 // GL does not know GL_MAJOR_VERSION and GL_MINOR_VERSION constants.
792 // This happens on some renderers like e.g. Cygwin MESA.
793 // Thus checking additionally if GL has put anything to
794 // the output variables.
795 if (::glGetError() == GL_NO_ERROR && aMajor != 0 && aMinor != 0)
797 theGlVerMajor = aMajor;
798 theGlVerMinor = aMinor;
801 for (GLenum anErr = ::glGetError(), aPrevErr = GL_NO_ERROR;; aPrevErr = anErr, anErr = ::glGetError())
803 if (anErr == GL_NO_ERROR
804 || anErr == aPrevErr)
811 // Read version string.
812 // Notice that only first two numbers split by point '2.1 XXXXX' are significant.
813 // Following trash (after space) is vendor-specific.
814 // New drivers also returns micro version of GL like '3.3.0' which has no meaning
815 // and should be considered as vendor-specific too.
816 const char* aVerStr = (const char* )glGetString (GL_VERSION);
817 if (aVerStr == NULL || *aVerStr == '\0')
819 // invalid GL context
823 //#if defined(GL_ES_VERSION_2_0)
824 // skip "OpenGL ES-** " section
825 for (; *aVerStr != '\0'; ++aVerStr)
827 if (*aVerStr >= '0' && *aVerStr <= '9')
834 // parse string for major number
838 while (aVerStr[aMajIter] >= '0' && aVerStr[aMajIter] <= '9')
842 if (aMajIter == 0 || aMajIter >= sizeof(aMajorStr))
846 memcpy (aMajorStr, aVerStr, aMajIter);
847 aMajorStr[aMajIter] = '\0';
849 // parse string for minor number
850 aVerStr += aMajIter + 1;
852 while (aVerStr[aMinIter] >= '0' && aVerStr[aMinIter] <= '9')
856 if (aMinIter == 0 || aMinIter >= sizeof(aMinorStr))
860 memcpy (aMinorStr, aVerStr, aMinIter);
861 aMinorStr[aMinIter] = '\0';
864 theGlVerMajor = atoi (aMajorStr);
865 theGlVerMinor = atoi (aMinorStr);
867 if (theGlVerMajor <= 0)
874 static Standard_CString THE_DBGMSG_UNKNOWN = "UNKNOWN";
875 static Standard_CString THE_DBGMSG_SOURCES[] =
877 ".OpenGL", // GL_DEBUG_SOURCE_API_ARB
878 ".WinSystem", // GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB
879 ".GLSL", // GL_DEBUG_SOURCE_SHADER_COMPILER_ARB
880 ".3rdParty", // GL_DEBUG_SOURCE_THIRD_PARTY_ARB
881 "", // GL_DEBUG_SOURCE_APPLICATION_ARB
882 ".Other" // GL_DEBUG_SOURCE_OTHER_ARB
885 static Standard_CString THE_DBGMSG_TYPES[] =
887 "Error", // GL_DEBUG_TYPE_ERROR_ARB
888 "Deprecated", // GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB
889 "Undef. behavior", // GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB
890 "Portability", // GL_DEBUG_TYPE_PORTABILITY_ARB
891 "Performance", // GL_DEBUG_TYPE_PERFORMANCE_ARB
892 "Other" // GL_DEBUG_TYPE_OTHER_ARB
895 static Standard_CString THE_DBGMSG_SEV_HIGH = "High"; // GL_DEBUG_SEVERITY_HIGH_ARB
896 static Standard_CString THE_DBGMSG_SEV_MEDIUM = "Medium"; // GL_DEBUG_SEVERITY_MEDIUM_ARB
897 static Standard_CString THE_DBGMSG_SEV_LOW = "Low"; // GL_DEBUG_SEVERITY_LOW_ARB
899 #if !defined(GL_ES_VERSION_2_0)
900 //! Callback for GL_ARB_debug_output extension
901 static void APIENTRY debugCallbackWrap(unsigned int theSource,
902 unsigned int theType,
904 unsigned int theSeverity,
906 const char* theMessage,
907 const void* theUserParam)
909 OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
910 aCtx->PushMessage (theSource, theType, theId, theSeverity, theMessage);
914 // =======================================================================
915 // function : PushMessage
917 // =======================================================================
918 void OpenGl_Context::PushMessage (const unsigned int theSource,
919 const unsigned int theType,
920 const unsigned int theId,
921 const unsigned int theSeverity,
922 const TCollection_ExtendedString& theMessage)
924 if (caps->suppressExtraMsg
925 && theSource >= GL_DEBUG_SOURCE_API_ARB
926 && theSource <= GL_DEBUG_SOURCE_OTHER_ARB
927 && myFilters[theSource - GL_DEBUG_SOURCE_API_ARB].Contains (theId))
932 Standard_CString& aSrc = (theSource >= GL_DEBUG_SOURCE_API_ARB
933 && theSource <= GL_DEBUG_SOURCE_OTHER_ARB)
934 ? THE_DBGMSG_SOURCES[theSource - GL_DEBUG_SOURCE_API_ARB]
935 : THE_DBGMSG_UNKNOWN;
936 Standard_CString& aType = (theType >= GL_DEBUG_TYPE_ERROR_ARB
937 && theType <= GL_DEBUG_TYPE_OTHER_ARB)
938 ? THE_DBGMSG_TYPES[theType - GL_DEBUG_TYPE_ERROR_ARB]
939 : THE_DBGMSG_UNKNOWN;
940 Standard_CString& aSev = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
941 ? THE_DBGMSG_SEV_HIGH
942 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
943 ? THE_DBGMSG_SEV_MEDIUM
944 : THE_DBGMSG_SEV_LOW);
945 Message_Gravity aGrav = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
947 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
951 TCollection_ExtendedString aMsg;
952 aMsg += "TKOpenGl"; aMsg += aSrc;
953 aMsg += " | Type: "; aMsg += aType;
954 aMsg += " | ID: "; aMsg += (Standard_Integer )theId;
955 aMsg += " | Severity: "; aMsg += aSev;
956 aMsg += " | Message:\n ";
958 Messenger()->Send (aMsg, aGrav);
961 // =======================================================================
962 // function : ExcludeMessage
964 // ======================================================================
965 Standard_Boolean OpenGl_Context::ExcludeMessage (const unsigned int theSource,
966 const unsigned int theId)
968 return theSource >= GL_DEBUG_SOURCE_API_ARB
969 && theSource <= GL_DEBUG_SOURCE_OTHER_ARB
970 && myFilters[theSource - GL_DEBUG_SOURCE_API_ARB].Add (theId);
973 // =======================================================================
974 // function : IncludeMessage
976 // ======================================================================
977 Standard_Boolean OpenGl_Context::IncludeMessage (const unsigned int theSource,
978 const unsigned int theId)
980 return theSource >= GL_DEBUG_SOURCE_API_ARB
981 && theSource <= GL_DEBUG_SOURCE_OTHER_ARB
982 && myFilters[theSource - GL_DEBUG_SOURCE_API_ARB].Remove (theId);
985 // =======================================================================
986 // function : checkWrongVersion
988 // ======================================================================
989 void OpenGl_Context::checkWrongVersion (const Standard_Integer theGlVerMajor,
990 const Standard_Integer theGlVerMinor)
992 if (!IsGlGreaterEqual (theGlVerMajor, theGlVerMinor))
997 TCollection_ExtendedString aMsg = TCollection_ExtendedString()
998 + "Error! OpenGL context reports version "
999 + myGlVerMajor + "." + myGlVerMinor
1000 + " but does not export required functions for "
1001 + theGlVerMajor + "." + theGlVerMinor;
1002 PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB,
1003 GL_DEBUG_TYPE_ERROR_ARB,
1005 GL_DEBUG_SEVERITY_HIGH_ARB,
1009 // =======================================================================
1012 // =======================================================================
1013 void OpenGl_Context::init (const Standard_Boolean theIsCoreProfile)
1018 ReadGlVersion (myGlVerMajor, myGlVerMinor);
1019 myVendor = (const char* )::glGetString (GL_VENDOR);
1021 #if defined(GL_ES_VERSION_2_0)
1022 (void )theIsCoreProfile;
1023 const bool isCoreProfile = false;
1026 if (myVendor.Search ("NVIDIA") != -1)
1028 // Buffer detailed info: Buffer object 1 (bound to GL_ARRAY_BUFFER_ARB, usage hint is GL_STATIC_DRAW)
1029 // will use VIDEO memory as the source for buffer object operations.
1030 ExcludeMessage (GL_DEBUG_SOURCE_API_ARB, 131185);
1032 if (IsGlGreaterEqual (3, 0))
1034 // retrieve auxiliary function in advance
1035 FindProc ("glGetStringi", myFuncs->glGetStringi);
1038 bool isCoreProfile = false;
1039 if (IsGlGreaterEqual (3, 2))
1041 isCoreProfile = (theIsCoreProfile == Standard_True);
1043 // detect Core profile
1047 ::glGetIntegerv (GL_CONTEXT_PROFILE_MASK, &aProfile);
1048 isCoreProfile = (aProfile & GL_CONTEXT_CORE_PROFILE_BIT) != 0;
1056 core11 = (OpenGl_GlCore11* )(&(*myFuncs));
1058 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
1076 arbTboRGB32 = Standard_False;
1084 #if defined(GL_ES_VERSION_2_0)
1086 hasTexRGBA8 = IsGlGreaterEqual (3, 0)
1087 || CheckExtension ("GL_OES_rgb8_rgba8");
1088 // NPOT textures has limited support within OpenGL ES 2.0
1089 // which are relaxed by OpenGL ES 3.0 or some extensions
1090 //arbNPTW = IsGlGreaterEqual (3, 0)
1091 // || CheckExtension ("GL_OES_texture_npot")
1092 // || CheckExtension ("GL_NV_texture_npot_2D_mipmap");
1093 arbNPTW = Standard_True;
1094 arbTexRG = IsGlGreaterEqual (3, 0)
1095 || CheckExtension ("GL_EXT_texture_rg");
1096 extBgra = CheckExtension ("GL_EXT_texture_format_BGRA8888");
1097 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
1098 extPDS = CheckExtension ("GL_OES_packed_depth_stencil");
1100 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
1101 if (IsGlGreaterEqual (2, 0))
1103 // enable compatible functions
1104 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
1105 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
1106 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
1107 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
1109 if (IsGlGreaterEqual (3, 0)
1110 && FindProc ("glBlitFramebuffer", myFuncs->glBlitFramebuffer))
1112 arbFBOBlit = (OpenGl_ArbFBOBlit* )(&(*myFuncs));
1115 hasUintIndex = IsGlGreaterEqual (3, 0)
1116 || CheckExtension ("GL_OES_element_index_uint");
1117 hasHighp = CheckExtension ("GL_OES_fragment_precision_high");
1118 GLint aRange[2] = {0, 0};
1120 ::glGetShaderPrecisionFormat (GL_FRAGMENT_SHADER, GL_HIGH_FLOAT, aRange, &aPrec);
1123 hasHighp = Standard_True;
1127 myTexClamp = IsGlGreaterEqual (1, 2) ? GL_CLAMP_TO_EDGE : GL_CLAMP;
1129 hasTexRGBA8 = Standard_True;
1130 arbNPTW = CheckExtension ("GL_ARB_texture_non_power_of_two");
1131 extBgra = CheckExtension ("GL_EXT_bgra");
1132 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
1133 extPDS = CheckExtension ("GL_EXT_packed_depth_stencil");
1134 atiMem = CheckExtension ("GL_ATI_meminfo");
1135 nvxMem = CheckExtension ("GL_NVX_gpu_memory_info");
1137 GLint aStereo = GL_FALSE;
1138 glGetIntegerv (GL_STEREO, &aStereo);
1139 myIsStereoBuffers = aStereo == 1;
1141 // get number of maximum clipping planes
1142 glGetIntegerv (GL_MAX_CLIP_PLANES, &myMaxClipPlanes);
1145 glGetIntegerv (GL_MAX_TEXTURE_SIZE, &myMaxTexDim);
1149 glGetIntegerv (GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &myAnisoMax);
1152 myClippingState.Init (myMaxClipPlanes);
1154 #if !defined(GL_ES_VERSION_2_0)
1172 //! Make record shorter to retrieve function pointer using variable with same name
1173 #define FindProcShort(theFunc) FindProc(#theFunc, myFuncs->theFunc)
1175 // retrieve platform-dependent extensions
1176 #if defined(HAVE_EGL)
1178 #elif defined(_WIN32)
1179 if (FindProcShort (wglGetExtensionsStringARB))
1181 const char* aWglExts = myFuncs->wglGetExtensionsStringARB (wglGetCurrentDC());
1182 if (CheckExtension (aWglExts, "WGL_EXT_swap_control"))
1184 FindProcShort (wglSwapIntervalEXT);
1186 if (CheckExtension (aWglExts, "WGL_ARB_pixel_format"))
1188 FindProcShort (wglChoosePixelFormatARB);
1190 if (CheckExtension (aWglExts, "WGL_ARB_create_context_profile"))
1192 FindProcShort (wglCreateContextAttribsARB);
1194 if (CheckExtension (aWglExts, "WGL_NV_DX_interop"))
1196 FindProcShort (wglDXSetResourceShareHandleNV);
1197 FindProcShort (wglDXOpenDeviceNV);
1198 FindProcShort (wglDXCloseDeviceNV);
1199 FindProcShort (wglDXRegisterObjectNV);
1200 FindProcShort (wglDXUnregisterObjectNV);
1201 FindProcShort (wglDXObjectAccessNV);
1202 FindProcShort (wglDXLockObjectsNV);
1203 FindProcShort (wglDXUnlockObjectsNV);
1206 #elif defined(__APPLE__)
1209 const char* aGlxExts = ::glXQueryExtensionsString ((Display* )myDisplay, DefaultScreen ((Display* )myDisplay));
1210 if (CheckExtension (aGlxExts, "GLX_EXT_swap_control"))
1212 FindProcShort (glXSwapIntervalEXT);
1214 if (CheckExtension (aGlxExts, "GLX_SGI_swap_control"))
1216 FindProcShort (glXSwapIntervalSGI);
1218 //extSwapTear = CheckExtension (aGlxExts, "GLX_EXT_swap_control_tear");
1221 // initialize debug context extension
1222 if (CheckExtension ("GL_ARB_debug_output"))
1225 if (FindProcShort (glDebugMessageControlARB)
1226 && FindProcShort (glDebugMessageInsertARB)
1227 && FindProcShort (glDebugMessageCallbackARB)
1228 && FindProcShort (glGetDebugMessageLogARB))
1230 arbDbg = (OpenGl_ArbDbg* )(&(*myFuncs));
1233 && caps->contextDebug)
1235 // setup default callback
1236 myIsGlDebugCtx = Standard_True;
1237 arbDbg->glDebugMessageCallbackARB (debugCallbackWrap, this);
1238 if (caps->contextSyncDebug)
1240 ::glEnable (GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
1245 // load OpenGL 1.2 new functions
1246 has12 = IsGlGreaterEqual (1, 2)
1247 && FindProcShort (glBlendColor)
1248 && FindProcShort (glBlendEquation)
1249 && FindProcShort (glDrawRangeElements)
1250 && FindProcShort (glTexImage3D)
1251 && FindProcShort (glTexSubImage3D)
1252 && FindProcShort (glCopyTexSubImage3D);
1254 // load OpenGL 1.3 new functions
1255 has13 = IsGlGreaterEqual (1, 3)
1256 && FindProcShort (glActiveTexture)
1257 && FindProcShort (glSampleCoverage)
1258 && FindProcShort (glCompressedTexImage3D)
1259 && FindProcShort (glCompressedTexImage2D)
1260 && FindProcShort (glCompressedTexImage1D)
1261 && FindProcShort (glCompressedTexSubImage3D)
1262 && FindProcShort (glCompressedTexSubImage2D)
1263 && FindProcShort (glCompressedTexSubImage1D)
1264 && FindProcShort (glGetCompressedTexImage);
1269 && FindProcShort (glClientActiveTexture)
1270 && FindProcShort (glMultiTexCoord1d)
1271 && FindProcShort (glMultiTexCoord1dv)
1272 && FindProcShort (glMultiTexCoord1f)
1273 && FindProcShort (glMultiTexCoord1fv)
1274 && FindProcShort (glMultiTexCoord1i)
1275 && FindProcShort (glMultiTexCoord1iv)
1276 && FindProcShort (glMultiTexCoord1s)
1277 && FindProcShort (glMultiTexCoord1sv)
1278 && FindProcShort (glMultiTexCoord2d)
1279 && FindProcShort (glMultiTexCoord2dv)
1280 && FindProcShort (glMultiTexCoord2f)
1281 && FindProcShort (glMultiTexCoord2fv)
1282 && FindProcShort (glMultiTexCoord2i)
1283 && FindProcShort (glMultiTexCoord2iv)
1284 && FindProcShort (glMultiTexCoord2s)
1285 && FindProcShort (glMultiTexCoord2sv)
1286 && FindProcShort (glMultiTexCoord3d)
1287 && FindProcShort (glMultiTexCoord3dv)
1288 && FindProcShort (glMultiTexCoord3f)
1289 && FindProcShort (glMultiTexCoord3fv)
1290 && FindProcShort (glMultiTexCoord3i)
1291 && FindProcShort (glMultiTexCoord3iv)
1292 && FindProcShort (glMultiTexCoord3s)
1293 && FindProcShort (glMultiTexCoord3sv)
1294 && FindProcShort (glMultiTexCoord4d)
1295 && FindProcShort (glMultiTexCoord4dv)
1296 && FindProcShort (glMultiTexCoord4f)
1297 && FindProcShort (glMultiTexCoord4fv)
1298 && FindProcShort (glMultiTexCoord4i)
1299 && FindProcShort (glMultiTexCoord4iv)
1300 && FindProcShort (glMultiTexCoord4s)
1301 && FindProcShort (glMultiTexCoord4sv)
1302 && FindProcShort (glLoadTransposeMatrixf)
1303 && FindProcShort (glLoadTransposeMatrixd)
1304 && FindProcShort (glMultTransposeMatrixf)
1305 && FindProcShort (glMultTransposeMatrixd);
1308 // load OpenGL 1.4 new functions
1309 has14 = IsGlGreaterEqual (1, 4)
1310 && FindProcShort (glBlendFuncSeparate)
1311 && FindProcShort (glMultiDrawArrays)
1312 && FindProcShort (glMultiDrawElements)
1313 && FindProcShort (glPointParameterf)
1314 && FindProcShort (glPointParameterfv)
1315 && FindProcShort (glPointParameteri)
1316 && FindProcShort (glPointParameteriv);
1318 // load OpenGL 1.5 new functions
1319 has15 = IsGlGreaterEqual (1, 5)
1320 && FindProcShort (glGenQueries)
1321 && FindProcShort (glDeleteQueries)
1322 && FindProcShort (glIsQuery)
1323 && FindProcShort (glBeginQuery)
1324 && FindProcShort (glEndQuery)
1325 && FindProcShort (glGetQueryiv)
1326 && FindProcShort (glGetQueryObjectiv)
1327 && FindProcShort (glGetQueryObjectuiv)
1328 && FindProcShort (glBindBuffer)
1329 && FindProcShort (glDeleteBuffers)
1330 && FindProcShort (glGenBuffers)
1331 && FindProcShort (glIsBuffer)
1332 && FindProcShort (glBufferData)
1333 && FindProcShort (glBufferSubData)
1334 && FindProcShort (glGetBufferSubData)
1335 && FindProcShort (glMapBuffer)
1336 && FindProcShort (glUnmapBuffer)
1337 && FindProcShort (glGetBufferParameteriv)
1338 && FindProcShort (glGetBufferPointerv);
1340 // load OpenGL 2.0 new functions
1341 has20 = IsGlGreaterEqual (2, 0)
1342 && FindProcShort (glBlendEquationSeparate)
1343 && FindProcShort (glDrawBuffers)
1344 && FindProcShort (glStencilOpSeparate)
1345 && FindProcShort (glStencilFuncSeparate)
1346 && FindProcShort (glStencilMaskSeparate)
1347 && FindProcShort (glAttachShader)
1348 && FindProcShort (glBindAttribLocation)
1349 && FindProcShort (glCompileShader)
1350 && FindProcShort (glCreateProgram)
1351 && FindProcShort (glCreateShader)
1352 && FindProcShort (glDeleteProgram)
1353 && FindProcShort (glDeleteShader)
1354 && FindProcShort (glDetachShader)
1355 && FindProcShort (glDisableVertexAttribArray)
1356 && FindProcShort (glEnableVertexAttribArray)
1357 && FindProcShort (glGetActiveAttrib)
1358 && FindProcShort (glGetActiveUniform)
1359 && FindProcShort (glGetAttachedShaders)
1360 && FindProcShort (glGetAttribLocation)
1361 && FindProcShort (glGetProgramiv)
1362 && FindProcShort (glGetProgramInfoLog)
1363 && FindProcShort (glGetShaderiv)
1364 && FindProcShort (glGetShaderInfoLog)
1365 && FindProcShort (glGetShaderSource)
1366 && FindProcShort (glGetUniformLocation)
1367 && FindProcShort (glGetUniformfv)
1368 && FindProcShort (glGetUniformiv)
1369 && FindProcShort (glGetVertexAttribdv)
1370 && FindProcShort (glGetVertexAttribfv)
1371 && FindProcShort (glGetVertexAttribiv)
1372 && FindProcShort (glGetVertexAttribPointerv)
1373 && FindProcShort (glIsProgram)
1374 && FindProcShort (glIsShader)
1375 && FindProcShort (glLinkProgram)
1376 && FindProcShort (glShaderSource)
1377 && FindProcShort (glUseProgram)
1378 && FindProcShort (glUniform1f)
1379 && FindProcShort (glUniform2f)
1380 && FindProcShort (glUniform3f)
1381 && FindProcShort (glUniform4f)
1382 && FindProcShort (glUniform1i)
1383 && FindProcShort (glUniform2i)
1384 && FindProcShort (glUniform3i)
1385 && FindProcShort (glUniform4i)
1386 && FindProcShort (glUniform1fv)
1387 && FindProcShort (glUniform2fv)
1388 && FindProcShort (glUniform3fv)
1389 && FindProcShort (glUniform4fv)
1390 && FindProcShort (glUniform1iv)
1391 && FindProcShort (glUniform2iv)
1392 && FindProcShort (glUniform3iv)
1393 && FindProcShort (glUniform4iv)
1394 && FindProcShort (glUniformMatrix2fv)
1395 && FindProcShort (glUniformMatrix3fv)
1396 && FindProcShort (glUniformMatrix4fv)
1397 && FindProcShort (glValidateProgram)
1398 && FindProcShort (glVertexAttrib1d)
1399 && FindProcShort (glVertexAttrib1dv)
1400 && FindProcShort (glVertexAttrib1f)
1401 && FindProcShort (glVertexAttrib1fv)
1402 && FindProcShort (glVertexAttrib1s)
1403 && FindProcShort (glVertexAttrib1sv)
1404 && FindProcShort (glVertexAttrib2d)
1405 && FindProcShort (glVertexAttrib2dv)
1406 && FindProcShort (glVertexAttrib2f)
1407 && FindProcShort (glVertexAttrib2fv)
1408 && FindProcShort (glVertexAttrib2s)
1409 && FindProcShort (glVertexAttrib2sv)
1410 && FindProcShort (glVertexAttrib3d)
1411 && FindProcShort (glVertexAttrib3dv)
1412 && FindProcShort (glVertexAttrib3f)
1413 && FindProcShort (glVertexAttrib3fv)
1414 && FindProcShort (glVertexAttrib3s)
1415 && FindProcShort (glVertexAttrib3sv)
1416 && FindProcShort (glVertexAttrib4Nbv)
1417 && FindProcShort (glVertexAttrib4Niv)
1418 && FindProcShort (glVertexAttrib4Nsv)
1419 && FindProcShort (glVertexAttrib4Nub)
1420 && FindProcShort (glVertexAttrib4Nubv)
1421 && FindProcShort (glVertexAttrib4Nuiv)
1422 && FindProcShort (glVertexAttrib4Nusv)
1423 && FindProcShort (glVertexAttrib4bv)
1424 && FindProcShort (glVertexAttrib4d)
1425 && FindProcShort (glVertexAttrib4dv)
1426 && FindProcShort (glVertexAttrib4f)
1427 && FindProcShort (glVertexAttrib4fv)
1428 && FindProcShort (glVertexAttrib4iv)
1429 && FindProcShort (glVertexAttrib4s)
1430 && FindProcShort (glVertexAttrib4sv)
1431 && FindProcShort (glVertexAttrib4ubv)
1432 && FindProcShort (glVertexAttrib4uiv)
1433 && FindProcShort (glVertexAttrib4usv)
1434 && FindProcShort (glVertexAttribPointer);
1436 // load OpenGL 2.1 new functions
1437 has21 = IsGlGreaterEqual (2, 1)
1438 && FindProcShort (glUniformMatrix2x3fv)
1439 && FindProcShort (glUniformMatrix3x2fv)
1440 && FindProcShort (glUniformMatrix2x4fv)
1441 && FindProcShort (glUniformMatrix4x2fv)
1442 && FindProcShort (glUniformMatrix3x4fv)
1443 && FindProcShort (glUniformMatrix4x3fv);
1445 // load GL_ARB_framebuffer_object (added to OpenGL 3.0 core)
1446 const bool hasFBO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_framebuffer_object"))
1447 && FindProcShort (glIsRenderbuffer)
1448 && FindProcShort (glBindRenderbuffer)
1449 && FindProcShort (glDeleteRenderbuffers)
1450 && FindProcShort (glGenRenderbuffers)
1451 && FindProcShort (glRenderbufferStorage)
1452 && FindProcShort (glGetRenderbufferParameteriv)
1453 && FindProcShort (glIsFramebuffer)
1454 && FindProcShort (glBindFramebuffer)
1455 && FindProcShort (glDeleteFramebuffers)
1456 && FindProcShort (glGenFramebuffers)
1457 && FindProcShort (glCheckFramebufferStatus)
1458 && FindProcShort (glFramebufferTexture1D)
1459 && FindProcShort (glFramebufferTexture2D)
1460 && FindProcShort (glFramebufferTexture3D)
1461 && FindProcShort (glFramebufferRenderbuffer)
1462 && FindProcShort (glGetFramebufferAttachmentParameteriv)
1463 && FindProcShort (glGenerateMipmap)
1464 && FindProcShort (glBlitFramebuffer)
1465 && FindProcShort (glRenderbufferStorageMultisample)
1466 && FindProcShort (glFramebufferTextureLayer);
1468 // load GL_ARB_vertex_array_object (added to OpenGL 3.0 core)
1469 const bool hasVAO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_vertex_array_object"))
1470 && FindProcShort (glBindVertexArray)
1471 && FindProcShort (glDeleteVertexArrays)
1472 && FindProcShort (glGenVertexArrays)
1473 && FindProcShort (glIsVertexArray);
1475 // load GL_ARB_map_buffer_range (added to OpenGL 3.0 core)
1476 const bool hasMapBufferRange = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_map_buffer_range"))
1477 && FindProcShort (glMapBufferRange)
1478 && FindProcShort (glFlushMappedBufferRange);
1480 // load OpenGL 3.0 new functions
1481 has30 = IsGlGreaterEqual (3, 0)
1484 && hasMapBufferRange
1485 && FindProcShort (glColorMaski)
1486 && FindProcShort (glGetBooleani_v)
1487 && FindProcShort (glGetIntegeri_v)
1488 && FindProcShort (glEnablei)
1489 && FindProcShort (glDisablei)
1490 && FindProcShort (glIsEnabledi)
1491 && FindProcShort (glBeginTransformFeedback)
1492 && FindProcShort (glEndTransformFeedback)
1493 && FindProcShort (glBindBufferRange)
1494 && FindProcShort (glBindBufferBase)
1495 && FindProcShort (glTransformFeedbackVaryings)
1496 && FindProcShort (glGetTransformFeedbackVarying)
1497 && FindProcShort (glClampColor)
1498 && FindProcShort (glBeginConditionalRender)
1499 && FindProcShort (glEndConditionalRender)
1500 && FindProcShort (glVertexAttribIPointer)
1501 && FindProcShort (glGetVertexAttribIiv)
1502 && FindProcShort (glGetVertexAttribIuiv)
1503 && FindProcShort (glVertexAttribI1i)
1504 && FindProcShort (glVertexAttribI2i)
1505 && FindProcShort (glVertexAttribI3i)
1506 && FindProcShort (glVertexAttribI4i)
1507 && FindProcShort (glVertexAttribI1ui)
1508 && FindProcShort (glVertexAttribI2ui)
1509 && FindProcShort (glVertexAttribI3ui)
1510 && FindProcShort (glVertexAttribI4ui)
1511 && FindProcShort (glVertexAttribI1iv)
1512 && FindProcShort (glVertexAttribI2iv)
1513 && FindProcShort (glVertexAttribI3iv)
1514 && FindProcShort (glVertexAttribI4iv)
1515 && FindProcShort (glVertexAttribI1uiv)
1516 && FindProcShort (glVertexAttribI2uiv)
1517 && FindProcShort (glVertexAttribI3uiv)
1518 && FindProcShort (glVertexAttribI4uiv)
1519 && FindProcShort (glVertexAttribI4bv)
1520 && FindProcShort (glVertexAttribI4sv)
1521 && FindProcShort (glVertexAttribI4ubv)
1522 && FindProcShort (glVertexAttribI4usv)
1523 && FindProcShort (glGetUniformuiv)
1524 && FindProcShort (glBindFragDataLocation)
1525 && FindProcShort (glGetFragDataLocation)
1526 && FindProcShort (glUniform1ui)
1527 && FindProcShort (glUniform2ui)
1528 && FindProcShort (glUniform3ui)
1529 && FindProcShort (glUniform4ui)
1530 && FindProcShort (glUniform1uiv)
1531 && FindProcShort (glUniform2uiv)
1532 && FindProcShort (glUniform3uiv)
1533 && FindProcShort (glUniform4uiv)
1534 && FindProcShort (glTexParameterIiv)
1535 && FindProcShort (glTexParameterIuiv)
1536 && FindProcShort (glGetTexParameterIiv)
1537 && FindProcShort (glGetTexParameterIuiv)
1538 && FindProcShort (glClearBufferiv)
1539 && FindProcShort (glClearBufferuiv)
1540 && FindProcShort (glClearBufferfv)
1541 && FindProcShort (glClearBufferfi)
1542 && FindProcShort (glGetStringi);
1544 // load GL_ARB_uniform_buffer_object (added to OpenGL 3.1 core)
1545 const bool hasUBO = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_uniform_buffer_object"))
1546 && FindProcShort (glGetUniformIndices)
1547 && FindProcShort (glGetActiveUniformsiv)
1548 && FindProcShort (glGetActiveUniformName)
1549 && FindProcShort (glGetUniformBlockIndex)
1550 && FindProcShort (glGetActiveUniformBlockiv)
1551 && FindProcShort (glGetActiveUniformBlockName)
1552 && FindProcShort (glUniformBlockBinding);
1554 // load GL_ARB_copy_buffer (added to OpenGL 3.1 core)
1555 const bool hasCopyBufSubData = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_copy_buffer"))
1556 && FindProcShort (glCopyBufferSubData);
1560 // NPOT textures are required by OpenGL 2.0 specifications
1561 // but doesn't hardware accelerated by some ancient OpenGL 2.1 hardware (GeForce FX, RadeOn 9700 etc.)
1562 arbNPTW = Standard_True;
1563 arbTexRG = Standard_True;
1566 // load OpenGL 3.1 new functions
1567 has31 = IsGlGreaterEqual (3, 1)
1569 && hasCopyBufSubData
1570 && FindProcShort (glDrawArraysInstanced)
1571 && FindProcShort (glDrawElementsInstanced)
1572 && FindProcShort (glTexBuffer)
1573 && FindProcShort (glPrimitiveRestartIndex);
1575 // load GL_ARB_draw_elements_base_vertex (added to OpenGL 3.2 core)
1576 const bool hasDrawElemsBaseVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_draw_elements_base_vertex"))
1577 && FindProcShort (glDrawElementsBaseVertex)
1578 && FindProcShort (glDrawRangeElementsBaseVertex)
1579 && FindProcShort (glDrawElementsInstancedBaseVertex)
1580 && FindProcShort (glMultiDrawElementsBaseVertex);
1582 // load GL_ARB_provoking_vertex (added to OpenGL 3.2 core)
1583 const bool hasProvokingVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_provoking_vertex"))
1584 && FindProcShort (glProvokingVertex);
1586 // load GL_ARB_sync (added to OpenGL 3.2 core)
1587 const bool hasSync = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_sync"))
1588 && FindProcShort (glFenceSync)
1589 && FindProcShort (glIsSync)
1590 && FindProcShort (glDeleteSync)
1591 && FindProcShort (glClientWaitSync)
1592 && FindProcShort (glWaitSync)
1593 && FindProcShort (glGetInteger64v)
1594 && FindProcShort (glGetSynciv);
1596 // load GL_ARB_texture_multisample (added to OpenGL 3.2 core)
1597 const bool hasTextureMultisample = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_texture_multisample"))
1598 && FindProcShort (glTexImage2DMultisample)
1599 && FindProcShort (glTexImage3DMultisample)
1600 && FindProcShort (glGetMultisamplefv)
1601 && FindProcShort (glSampleMaski);
1603 // load OpenGL 3.2 new functions
1604 has32 = IsGlGreaterEqual (3, 2)
1605 && hasDrawElemsBaseVert
1608 && hasTextureMultisample
1609 && FindProcShort (glGetInteger64i_v)
1610 && FindProcShort (glGetBufferParameteri64v)
1611 && FindProcShort (glFramebufferTexture);
1613 // load GL_ARB_blend_func_extended (added to OpenGL 3.3 core)
1614 const bool hasBlendFuncExtended = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_blend_func_extended"))
1615 && FindProcShort (glBindFragDataLocationIndexed)
1616 && FindProcShort (glGetFragDataIndex);
1618 // load GL_ARB_sampler_objects (added to OpenGL 3.3 core)
1619 const bool hasSamplerObjects = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_sampler_objects"))
1620 && FindProcShort (glGenSamplers)
1621 && FindProcShort (glDeleteSamplers)
1622 && FindProcShort (glIsSampler)
1623 && FindProcShort (glBindSampler)
1624 && FindProcShort (glSamplerParameteri)
1625 && FindProcShort (glSamplerParameteriv)
1626 && FindProcShort (glSamplerParameterf)
1627 && FindProcShort (glSamplerParameterfv)
1628 && FindProcShort (glSamplerParameterIiv)
1629 && FindProcShort (glSamplerParameterIuiv)
1630 && FindProcShort (glGetSamplerParameteriv)
1631 && FindProcShort (glGetSamplerParameterIiv)
1632 && FindProcShort (glGetSamplerParameterfv)
1633 && FindProcShort (glGetSamplerParameterIuiv);
1635 // load GL_ARB_timer_query (added to OpenGL 3.3 core)
1636 const bool hasTimerQuery = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_timer_query"))
1637 && FindProcShort (glQueryCounter)
1638 && FindProcShort (glGetQueryObjecti64v)
1639 && FindProcShort (glGetQueryObjectui64v);
1641 // load GL_ARB_vertex_type_2_10_10_10_rev (added to OpenGL 3.3 core)
1642 const bool hasVertType21010101rev = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_vertex_type_2_10_10_10_rev"))
1643 && FindProcShort (glVertexAttribP1ui)
1644 && FindProcShort (glVertexAttribP1uiv)
1645 && FindProcShort (glVertexAttribP2ui)
1646 && FindProcShort (glVertexAttribP2uiv)
1647 && FindProcShort (glVertexAttribP3ui)
1648 && FindProcShort (glVertexAttribP3uiv)
1649 && FindProcShort (glVertexAttribP4ui)
1650 && FindProcShort (glVertexAttribP4uiv);
1652 if ( hasVertType21010101rev
1655 // load deprecated functions
1656 const bool hasVertType21010101revExt =
1657 FindProcShort (glVertexP2ui)
1658 && FindProcShort (glVertexP2uiv)
1659 && FindProcShort (glVertexP3ui)
1660 && FindProcShort (glVertexP3uiv)
1661 && FindProcShort (glVertexP4ui)
1662 && FindProcShort (glVertexP4uiv)
1663 && FindProcShort (glTexCoordP1ui)
1664 && FindProcShort (glTexCoordP1uiv)
1665 && FindProcShort (glTexCoordP2ui)
1666 && FindProcShort (glTexCoordP2uiv)
1667 && FindProcShort (glTexCoordP3ui)
1668 && FindProcShort (glTexCoordP3uiv)
1669 && FindProcShort (glTexCoordP4ui)
1670 && FindProcShort (glTexCoordP4uiv)
1671 && FindProcShort (glMultiTexCoordP1ui)
1672 && FindProcShort (glMultiTexCoordP1uiv)
1673 && FindProcShort (glMultiTexCoordP2ui)
1674 && FindProcShort (glMultiTexCoordP2uiv)
1675 && FindProcShort (glMultiTexCoordP3ui)
1676 && FindProcShort (glMultiTexCoordP3uiv)
1677 && FindProcShort (glMultiTexCoordP4ui)
1678 && FindProcShort (glMultiTexCoordP4uiv)
1679 && FindProcShort (glNormalP3ui)
1680 && FindProcShort (glNormalP3uiv)
1681 && FindProcShort (glColorP3ui)
1682 && FindProcShort (glColorP3uiv)
1683 && FindProcShort (glColorP4ui)
1684 && FindProcShort (glColorP4uiv)
1685 && FindProcShort (glSecondaryColorP3ui)
1686 && FindProcShort (glSecondaryColorP3uiv);
1687 (void )hasVertType21010101revExt;
1690 // load OpenGL 3.3 extra functions
1691 has33 = IsGlGreaterEqual (3, 3)
1692 && hasBlendFuncExtended
1693 && hasSamplerObjects
1695 && hasVertType21010101rev
1696 && FindProcShort (glVertexAttribDivisor);
1698 // load GL_ARB_draw_indirect (added to OpenGL 4.0 core)
1699 const bool hasDrawIndirect = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_draw_indirect"))
1700 && FindProcShort (glDrawArraysIndirect)
1701 && FindProcShort (glDrawElementsIndirect);
1703 // load GL_ARB_gpu_shader_fp64 (added to OpenGL 4.0 core)
1704 const bool hasShaderFP64 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_gpu_shader_fp64"))
1705 && FindProcShort (glUniform1d)
1706 && FindProcShort (glUniform2d)
1707 && FindProcShort (glUniform3d)
1708 && FindProcShort (glUniform4d)
1709 && FindProcShort (glUniform1dv)
1710 && FindProcShort (glUniform2dv)
1711 && FindProcShort (glUniform3dv)
1712 && FindProcShort (glUniform4dv)
1713 && FindProcShort (glUniformMatrix2dv)
1714 && FindProcShort (glUniformMatrix3dv)
1715 && FindProcShort (glUniformMatrix4dv)
1716 && FindProcShort (glUniformMatrix2x3dv)
1717 && FindProcShort (glUniformMatrix2x4dv)
1718 && FindProcShort (glUniformMatrix3x2dv)
1719 && FindProcShort (glUniformMatrix3x4dv)
1720 && FindProcShort (glUniformMatrix4x2dv)
1721 && FindProcShort (glUniformMatrix4x3dv)
1722 && FindProcShort (glGetUniformdv);
1724 // load GL_ARB_shader_subroutine (added to OpenGL 4.0 core)
1725 const bool hasShaderSubroutine = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_shader_subroutine"))
1726 && FindProcShort (glGetSubroutineUniformLocation)
1727 && FindProcShort (glGetSubroutineIndex)
1728 && FindProcShort (glGetActiveSubroutineUniformiv)
1729 && FindProcShort (glGetActiveSubroutineUniformName)
1730 && FindProcShort (glGetActiveSubroutineName)
1731 && FindProcShort (glUniformSubroutinesuiv)
1732 && FindProcShort (glGetUniformSubroutineuiv)
1733 && FindProcShort (glGetProgramStageiv);
1735 // load GL_ARB_tessellation_shader (added to OpenGL 4.0 core)
1736 const bool hasTessellationShader = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_tessellation_shader"))
1737 && FindProcShort (glPatchParameteri)
1738 && FindProcShort (glPatchParameterfv);
1740 // load GL_ARB_transform_feedback2 (added to OpenGL 4.0 core)
1741 const bool hasTrsfFeedback2 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback2"))
1742 && FindProcShort (glBindTransformFeedback)
1743 && FindProcShort (glDeleteTransformFeedbacks)
1744 && FindProcShort (glGenTransformFeedbacks)
1745 && FindProcShort (glIsTransformFeedback)
1746 && FindProcShort (glPauseTransformFeedback)
1747 && FindProcShort (glResumeTransformFeedback)
1748 && FindProcShort (glDrawTransformFeedback);
1750 // load GL_ARB_transform_feedback3 (added to OpenGL 4.0 core)
1751 const bool hasTrsfFeedback3 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback3"))
1752 && FindProcShort (glDrawTransformFeedbackStream)
1753 && FindProcShort (glBeginQueryIndexed)
1754 && FindProcShort (glEndQueryIndexed)
1755 && FindProcShort (glGetQueryIndexediv);
1757 // load OpenGL 4.0 new functions
1758 has40 = IsGlGreaterEqual (4, 0)
1761 && hasShaderSubroutine
1762 && hasTessellationShader
1765 && FindProcShort (glMinSampleShading)
1766 && FindProcShort (glBlendEquationi)
1767 && FindProcShort (glBlendEquationSeparatei)
1768 && FindProcShort (glBlendFunci)
1769 && FindProcShort (glBlendFuncSeparatei);
1771 // load GL_ARB_ES2_compatibility (added to OpenGL 4.1 core)
1772 const bool hasES2Compatibility = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_ES2_compatibility"))
1773 && FindProcShort (glReleaseShaderCompiler)
1774 && FindProcShort (glShaderBinary)
1775 && FindProcShort (glGetShaderPrecisionFormat)
1776 && FindProcShort (glDepthRangef)
1777 && FindProcShort (glClearDepthf);
1779 // load GL_ARB_get_program_binary (added to OpenGL 4.1 core)
1780 const bool hasGetProgramBinary = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_get_program_binary"))
1781 && FindProcShort (glGetProgramBinary)
1782 && FindProcShort (glProgramBinary)
1783 && FindProcShort (glProgramParameteri);
1786 // load GL_ARB_separate_shader_objects (added to OpenGL 4.1 core)
1787 const bool hasSeparateShaderObjects = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_separate_shader_objects"))
1788 && FindProcShort (glUseProgramStages)
1789 && FindProcShort (glActiveShaderProgram)
1790 && FindProcShort (glCreateShaderProgramv)
1791 && FindProcShort (glBindProgramPipeline)
1792 && FindProcShort (glDeleteProgramPipelines)
1793 && FindProcShort (glGenProgramPipelines)
1794 && FindProcShort (glIsProgramPipeline)
1795 && FindProcShort (glGetProgramPipelineiv)
1796 && FindProcShort (glProgramUniform1i)
1797 && FindProcShort (glProgramUniform1iv)
1798 && FindProcShort (glProgramUniform1f)
1799 && FindProcShort (glProgramUniform1fv)
1800 && FindProcShort (glProgramUniform1d)
1801 && FindProcShort (glProgramUniform1dv)
1802 && FindProcShort (glProgramUniform1ui)
1803 && FindProcShort (glProgramUniform1uiv)
1804 && FindProcShort (glProgramUniform2i)
1805 && FindProcShort (glProgramUniform2iv)
1806 && FindProcShort (glProgramUniform2f)
1807 && FindProcShort (glProgramUniform2fv)
1808 && FindProcShort (glProgramUniform2d)
1809 && FindProcShort (glProgramUniform2dv)
1810 && FindProcShort (glProgramUniform2ui)
1811 && FindProcShort (glProgramUniform2uiv)
1812 && FindProcShort (glProgramUniform3i)
1813 && FindProcShort (glProgramUniform3iv)
1814 && FindProcShort (glProgramUniform3f)
1815 && FindProcShort (glProgramUniform3fv)
1816 && FindProcShort (glProgramUniform3d)
1817 && FindProcShort (glProgramUniform3dv)
1818 && FindProcShort (glProgramUniform3ui)
1819 && FindProcShort (glProgramUniform3uiv)
1820 && FindProcShort (glProgramUniform4i)
1821 && FindProcShort (glProgramUniform4iv)
1822 && FindProcShort (glProgramUniform4f)
1823 && FindProcShort (glProgramUniform4fv)
1824 && FindProcShort (glProgramUniform4d)
1825 && FindProcShort (glProgramUniform4dv)
1826 && FindProcShort (glProgramUniform4ui)
1827 && FindProcShort (glProgramUniform4uiv)
1828 && FindProcShort (glProgramUniformMatrix2fv)
1829 && FindProcShort (glProgramUniformMatrix3fv)
1830 && FindProcShort (glProgramUniformMatrix4fv)
1831 && FindProcShort (glProgramUniformMatrix2dv)
1832 && FindProcShort (glProgramUniformMatrix3dv)
1833 && FindProcShort (glProgramUniformMatrix4dv)
1834 && FindProcShort (glProgramUniformMatrix2x3fv)
1835 && FindProcShort (glProgramUniformMatrix3x2fv)
1836 && FindProcShort (glProgramUniformMatrix2x4fv)
1837 && FindProcShort (glProgramUniformMatrix4x2fv)
1838 && FindProcShort (glProgramUniformMatrix3x4fv)
1839 && FindProcShort (glProgramUniformMatrix4x3fv)
1840 && FindProcShort (glProgramUniformMatrix2x3dv)
1841 && FindProcShort (glProgramUniformMatrix3x2dv)
1842 && FindProcShort (glProgramUniformMatrix2x4dv)
1843 && FindProcShort (glProgramUniformMatrix4x2dv)
1844 && FindProcShort (glProgramUniformMatrix3x4dv)
1845 && FindProcShort (glProgramUniformMatrix4x3dv)
1846 && FindProcShort (glValidateProgramPipeline)
1847 && FindProcShort (glGetProgramPipelineInfoLog);
1849 // load GL_ARB_vertex_attrib_64bit (added to OpenGL 4.1 core)
1850 const bool hasVertAttrib64bit = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_vertex_attrib_64bit"))
1851 && FindProcShort (glVertexAttribL1d)
1852 && FindProcShort (glVertexAttribL2d)
1853 && FindProcShort (glVertexAttribL3d)
1854 && FindProcShort (glVertexAttribL4d)
1855 && FindProcShort (glVertexAttribL1dv)
1856 && FindProcShort (glVertexAttribL2dv)
1857 && FindProcShort (glVertexAttribL3dv)
1858 && FindProcShort (glVertexAttribL4dv)
1859 && FindProcShort (glVertexAttribLPointer)
1860 && FindProcShort (glGetVertexAttribLdv);
1862 // load GL_ARB_viewport_array (added to OpenGL 4.1 core)
1863 const bool hasViewportArray = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_viewport_array"))
1864 && FindProcShort (glViewportArrayv)
1865 && FindProcShort (glViewportIndexedf)
1866 && FindProcShort (glViewportIndexedfv)
1867 && FindProcShort (glScissorArrayv)
1868 && FindProcShort (glScissorIndexed)
1869 && FindProcShort (glScissorIndexedv)
1870 && FindProcShort (glDepthRangeArrayv)
1871 && FindProcShort (glDepthRangeIndexed)
1872 && FindProcShort (glGetFloati_v)
1873 && FindProcShort (glGetDoublei_v);
1875 has41 = IsGlGreaterEqual (4, 1)
1876 && hasES2Compatibility
1877 && hasGetProgramBinary
1878 && hasSeparateShaderObjects
1879 && hasVertAttrib64bit
1880 && hasViewportArray;
1882 // load GL_ARB_base_instance (added to OpenGL 4.2 core)
1883 const bool hasBaseInstance = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_base_instance"))
1884 && FindProcShort (glDrawArraysInstancedBaseInstance)
1885 && FindProcShort (glDrawElementsInstancedBaseInstance)
1886 && FindProcShort (glDrawElementsInstancedBaseVertexBaseInstance);
1888 // load GL_ARB_transform_feedback_instanced (added to OpenGL 4.2 core)
1889 const bool hasTrsfFeedbackInstanced = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_transform_feedback_instanced"))
1890 && FindProcShort (glDrawTransformFeedbackInstanced)
1891 && FindProcShort (glDrawTransformFeedbackStreamInstanced);
1893 // load GL_ARB_internalformat_query (added to OpenGL 4.2 core)
1894 const bool hasInternalFormatQuery = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_internalformat_query"))
1895 && FindProcShort (glGetInternalformativ);
1897 // load GL_ARB_shader_atomic_counters (added to OpenGL 4.2 core)
1898 const bool hasShaderAtomicCounters = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_atomic_counters"))
1899 && FindProcShort (glGetActiveAtomicCounterBufferiv);
1901 // load GL_ARB_shader_image_load_store (added to OpenGL 4.2 core)
1902 const bool hasShaderImgLoadStore = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_image_load_store"))
1903 && FindProcShort (glBindImageTexture)
1904 && FindProcShort (glMemoryBarrier);
1906 // load GL_ARB_texture_storage (added to OpenGL 4.2 core)
1907 const bool hasTextureStorage = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_texture_storage"))
1908 && FindProcShort (glTexStorage1D)
1909 && FindProcShort (glTexStorage2D)
1910 && FindProcShort (glTexStorage3D);
1912 has42 = IsGlGreaterEqual (4, 2)
1914 && hasTrsfFeedbackInstanced
1915 && hasInternalFormatQuery
1916 && hasShaderAtomicCounters
1917 && hasShaderImgLoadStore
1918 && hasTextureStorage;
1920 has43 = IsGlGreaterEqual (4, 3)
1921 && FindProcShort (glClearBufferData)
1922 && FindProcShort (glClearBufferSubData)
1923 && FindProcShort (glDispatchCompute)
1924 && FindProcShort (glDispatchComputeIndirect)
1925 && FindProcShort (glCopyImageSubData)
1926 && FindProcShort (glFramebufferParameteri)
1927 && FindProcShort (glGetFramebufferParameteriv)
1928 && FindProcShort (glGetInternalformati64v)
1929 && FindProcShort (glInvalidateTexSubImage)
1930 && FindProcShort (glInvalidateTexImage)
1931 && FindProcShort (glInvalidateBufferSubData)
1932 && FindProcShort (glInvalidateBufferData)
1933 && FindProcShort (glInvalidateFramebuffer)
1934 && FindProcShort (glInvalidateSubFramebuffer)
1935 && FindProcShort (glMultiDrawArraysIndirect)
1936 && FindProcShort (glMultiDrawElementsIndirect)
1937 && FindProcShort (glGetProgramInterfaceiv)
1938 && FindProcShort (glGetProgramResourceIndex)
1939 && FindProcShort (glGetProgramResourceName)
1940 && FindProcShort (glGetProgramResourceiv)
1941 && FindProcShort (glGetProgramResourceLocation)
1942 && FindProcShort (glGetProgramResourceLocationIndex)
1943 && FindProcShort (glShaderStorageBlockBinding)
1944 && FindProcShort (glTexBufferRange)
1945 && FindProcShort (glTexStorage2DMultisample)
1946 && FindProcShort (glTexStorage3DMultisample)
1947 && FindProcShort (glTextureView)
1948 && FindProcShort (glBindVertexBuffer)
1949 && FindProcShort (glVertexAttribFormat)
1950 && FindProcShort (glVertexAttribIFormat)
1951 && FindProcShort (glVertexAttribLFormat)
1952 && FindProcShort (glVertexAttribBinding)
1953 && FindProcShort (glVertexBindingDivisor)
1954 && FindProcShort (glDebugMessageControl)
1955 && FindProcShort (glDebugMessageInsert)
1956 && FindProcShort (glDebugMessageCallback)
1957 && FindProcShort (glGetDebugMessageLog)
1958 && FindProcShort (glPushDebugGroup)
1959 && FindProcShort (glPopDebugGroup)
1960 && FindProcShort (glObjectLabel)
1961 && FindProcShort (glGetObjectLabel)
1962 && FindProcShort (glObjectPtrLabel)
1963 && FindProcShort (glGetObjectPtrLabel);
1965 // load GL_ARB_clear_texture (added to OpenGL 4.4 core)
1966 bool arbTexClear = (IsGlGreaterEqual (4, 4) || CheckExtension ("GL_ARB_clear_texture"))
1967 && FindProcShort (glClearTexImage)
1968 && FindProcShort (glClearTexSubImage);
1970 has44 = IsGlGreaterEqual (4, 4)
1972 && FindProcShort (glBufferStorage)
1973 && FindProcShort (glBindBuffersBase)
1974 && FindProcShort (glBindBuffersRange)
1975 && FindProcShort (glBindTextures)
1976 && FindProcShort (glBindSamplers)
1977 && FindProcShort (glBindImageTextures)
1978 && FindProcShort (glBindVertexBuffers);
1980 // initialize TBO extension (ARB)
1982 && CheckExtension ("GL_ARB_texture_buffer_object")
1983 && FindProc ("glTexBufferARB", myFuncs->glTexBuffer))
1985 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1987 arbTboRGB32 = CheckExtension ("GL_ARB_texture_buffer_object_rgb32");
1989 // initialize hardware instancing extension (ARB)
1991 && CheckExtension ("GL_ARB_draw_instanced")
1992 && FindProc ("glDrawArraysInstancedARB", myFuncs->glDrawArraysInstanced)
1993 && FindProc ("glDrawElementsInstancedARB", myFuncs->glDrawElementsInstanced))
1995 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1998 // initialize FBO extension (ARB)
2001 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
2002 arbFBOBlit = (OpenGl_ArbFBOBlit* )(&(*myFuncs));
2003 extPDS = Standard_True; // extension for EXT, but part of ARB
2006 // initialize GS extension (EXT)
2007 if (CheckExtension ("GL_EXT_geometry_shader4")
2008 && FindProcShort (glProgramParameteriEXT))
2010 extGS = (OpenGl_ExtGS* )(&(*myFuncs));
2013 // initialize bindless texture extension (ARB)
2014 if (CheckExtension ("GL_ARB_bindless_texture")
2015 && FindProcShort (glGetTextureHandleARB)
2016 && FindProcShort (glGetTextureSamplerHandleARB)
2017 && FindProcShort (glMakeTextureHandleResidentARB)
2018 && FindProcShort (glMakeTextureHandleNonResidentARB)
2019 && FindProcShort (glGetImageHandleARB)
2020 && FindProcShort (glMakeImageHandleResidentARB)
2021 && FindProcShort (glMakeImageHandleNonResidentARB)
2022 && FindProcShort (glUniformHandleui64ARB)
2023 && FindProcShort (glUniformHandleui64vARB)
2024 && FindProcShort (glProgramUniformHandleui64ARB)
2025 && FindProcShort (glProgramUniformHandleui64vARB)
2026 && FindProcShort (glIsTextureHandleResidentARB)
2027 && FindProcShort (glIsImageHandleResidentARB)
2028 && FindProcShort (glVertexAttribL1ui64ARB)
2029 && FindProcShort (glVertexAttribL1ui64vARB)
2030 && FindProcShort (glGetVertexAttribLui64vARB))
2032 arbTexBindless = (OpenGl_ArbTexBindless* )(&(*myFuncs));
2037 checkWrongVersion (1, 2);
2044 checkWrongVersion (1, 3);
2051 checkWrongVersion (1, 4);
2058 checkWrongVersion (1, 5);
2065 core15 = (OpenGl_GlCore15* )(&(*myFuncs));
2067 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
2071 checkWrongVersion (2, 0);
2077 const char* aGlslVer = (const char* )::glGetString (GL_SHADING_LANGUAGE_VERSION);
2078 if (aGlslVer == NULL
2079 || *aGlslVer == '\0')
2081 // broken context has been detected
2082 TCollection_ExtendedString aMsg = TCollection_ExtendedString()
2083 + "Error! OpenGL context reports version "
2084 + myGlVerMajor + "." + myGlVerMinor
2085 + " but reports wrong GLSL version";
2086 PushMessage (GL_DEBUG_SOURCE_APPLICATION_ARB,
2087 GL_DEBUG_TYPE_ERROR_ARB,
2089 GL_DEBUG_SEVERITY_HIGH_ARB,
2098 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
2100 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
2104 checkWrongVersion (2, 1);
2112 checkWrongVersion (3, 0);
2120 checkWrongVersion (3, 1);
2125 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
2126 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
2130 checkWrongVersion (3, 2);
2135 core32 = (OpenGl_GlCore32* )(&(*myFuncs));
2138 core32->glGenVertexArrays (1, &myDefaultVao);
2142 core32back = (OpenGl_GlCore32Back* )(&(*myFuncs));
2147 checkWrongVersion (3, 3);
2152 core33 = (OpenGl_GlCore33* )(&(*myFuncs));
2155 core33back = (OpenGl_GlCore33Back* )(&(*myFuncs));
2158 // initialize sampler object
2159 myTexSampler = new OpenGl_Sampler();
2160 myTexSampler->Init (*this);
2164 checkWrongVersion (4, 0);
2169 arbTboRGB32 = Standard_True; // in core since OpenGL 4.0
2173 checkWrongVersion (4, 1);
2178 core41 = (OpenGl_GlCore41* )(&(*myFuncs));
2181 core41back = (OpenGl_GlCore41Back* )(&(*myFuncs));
2186 checkWrongVersion (4, 2);
2191 core42 = (OpenGl_GlCore42* )(&(*myFuncs));
2194 core42back = (OpenGl_GlCore42Back* )(&(*myFuncs));
2199 checkWrongVersion (4, 3);
2204 core43 = (OpenGl_GlCore43* )(&(*myFuncs));
2207 core43back = (OpenGl_GlCore43Back* )(&(*myFuncs));
2212 checkWrongVersion (4, 4);
2217 core44 = (OpenGl_GlCore44* )(&(*myFuncs));
2220 core44back = (OpenGl_GlCore44Back* )(&(*myFuncs));
2225 // =======================================================================
2226 // function : MemoryInfo
2228 // =======================================================================
2229 Standard_Size OpenGl_Context::AvailableMemory() const
2231 #if !defined(GL_ES_VERSION_2_0)
2234 // this is actually information for VBO pool
2235 // however because pools are mostly shared
2236 // it can be used for total GPU memory estimations
2239 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aMemInfo);
2240 // returned value is in KiB, however this maybe changed in future
2241 return Standard_Size(aMemInfo[0]) * 1024;
2245 // current available dedicated video memory (in KiB), currently unused GPU memory
2247 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aMemInfo);
2248 return Standard_Size(aMemInfo) * 1024;
2254 // =======================================================================
2255 // function : MemoryInfo
2257 // =======================================================================
2258 TCollection_AsciiString OpenGl_Context::MemoryInfo() const
2260 TCollection_AsciiString anInfo;
2261 #if !defined(GL_ES_VERSION_2_0)
2265 memset (aValues, 0, sizeof(aValues));
2266 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aValues);
2268 // total memory free in the pool
2269 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValues[0] / 1024) + " MiB\n";
2271 // largest available free block in the pool
2272 anInfo += TCollection_AsciiString (" Largest free block: ") + (aValues[1] / 1024) + " MiB\n";
2273 if (aValues[2] != aValues[0])
2275 // total auxiliary memory free
2276 anInfo += TCollection_AsciiString (" Free memory: ") + (aValues[2] / 1024) + " MiB\n";
2281 //current available dedicated video memory (in KiB), currently unused GPU memory
2283 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aValue);
2284 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValue / 1024) + " MiB\n";
2286 // dedicated video memory, total size (in KiB) of the GPU memory
2287 GLint aDedicated = 0;
2288 glGetIntegerv (GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX, &aDedicated);
2289 anInfo += TCollection_AsciiString (" GPU memory: ") + (aDedicated / 1024) + " MiB\n";
2291 // total available memory, total size (in KiB) of the memory available for allocations
2292 glGetIntegerv (GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX, &aValue);
2293 if (aValue != aDedicated)
2295 // different only for special configurations
2296 anInfo += TCollection_AsciiString (" Total memory: ") + (aValue / 1024) + " MiB\n";
2304 // =======================================================================
2305 // function : GetResource
2307 // =======================================================================
2308 const Handle(OpenGl_Resource)& OpenGl_Context::GetResource (const TCollection_AsciiString& theKey) const
2310 return mySharedResources->IsBound (theKey) ? mySharedResources->Find (theKey) : NULL_GL_RESOURCE;
2313 // =======================================================================
2314 // function : ShareResource
2316 // =======================================================================
2317 Standard_Boolean OpenGl_Context::ShareResource (const TCollection_AsciiString& theKey,
2318 const Handle(OpenGl_Resource)& theResource)
2320 if (theKey.IsEmpty() || theResource.IsNull())
2322 return Standard_False;
2324 return mySharedResources->Bind (theKey, theResource);
2327 // =======================================================================
2328 // function : ReleaseResource
2330 // =======================================================================
2331 void OpenGl_Context::ReleaseResource (const TCollection_AsciiString& theKey,
2332 const Standard_Boolean theToDelay)
2334 if (!mySharedResources->IsBound (theKey))
2338 const Handle(OpenGl_Resource)& aRes = mySharedResources->Find (theKey);
2339 if (aRes->GetRefCount() > 1)
2346 myDelayed->Bind (theKey, 1);
2350 aRes->Release (this);
2351 mySharedResources->UnBind (theKey);
2355 // =======================================================================
2356 // function : DelayedRelease
2358 // =======================================================================
2359 void OpenGl_Context::DelayedRelease (Handle(OpenGl_Resource)& theResource)
2361 myUnusedResources->Prepend (theResource);
2362 theResource.Nullify();
2365 // =======================================================================
2366 // function : ReleaseDelayed
2368 // =======================================================================
2369 void OpenGl_Context::ReleaseDelayed()
2371 // release queued elements
2372 while (!myUnusedResources->IsEmpty())
2374 myUnusedResources->First()->Release (this);
2375 myUnusedResources->RemoveFirst();
2378 // release delayed shared resources
2379 NCollection_Vector<TCollection_AsciiString> aDeadList;
2380 for (NCollection_DataMap<TCollection_AsciiString, Standard_Integer>::Iterator anIter (*myDelayed);
2381 anIter.More(); anIter.Next())
2383 if (++anIter.ChangeValue() <= 2)
2385 continue; // postpone release one more frame to ensure noone use it periodically
2388 const TCollection_AsciiString& aKey = anIter.Key();
2389 if (!mySharedResources->IsBound (aKey))
2391 // mixed unshared strategy delayed/undelayed was used!
2392 aDeadList.Append (aKey);
2396 Handle(OpenGl_Resource)& aRes = mySharedResources->ChangeFind (aKey);
2397 if (aRes->GetRefCount() > 1)
2399 // should be only 1 instance in mySharedResources
2400 // if not - resource was reused again
2401 aDeadList.Append (aKey);
2405 // release resource if no one requiested it more than 2 redraw calls
2406 aRes->Release (this);
2407 mySharedResources->UnBind (aKey);
2408 aDeadList.Append (aKey);
2411 for (Standard_Integer anIter = 0; anIter < aDeadList.Length(); ++anIter)
2413 myDelayed->UnBind (aDeadList.Value (anIter));
2417 // =======================================================================
2418 // function : BindProgram
2420 // =======================================================================
2421 Standard_Boolean OpenGl_Context::BindProgram (const Handle(OpenGl_ShaderProgram)& theProgram)
2423 if (core20fwd == NULL)
2425 return Standard_False;
2428 if (theProgram.IsNull()
2429 || !theProgram->IsValid())
2431 if (!myActiveProgram.IsNull())
2433 core20fwd->glUseProgram (OpenGl_ShaderProgram::NO_PROGRAM);
2434 myActiveProgram.Nullify();
2436 return Standard_False;
2439 myActiveProgram = theProgram;
2440 core20fwd->glUseProgram (theProgram->ProgramId());
2441 return Standard_True;
2444 // =======================================================================
2445 // function : BindDefaultVao
2447 // =======================================================================
2448 void OpenGl_Context::BindDefaultVao()
2450 #if !defined(GL_ES_VERSION_2_0)
2451 if (myDefaultVao == 0
2457 core32->glBindVertexArray (myDefaultVao);
2461 // =======================================================================
2462 // function : SetDefaultFrameBuffer
2464 // =======================================================================
2465 Handle(OpenGl_FrameBuffer) OpenGl_Context::SetDefaultFrameBuffer (const Handle(OpenGl_FrameBuffer)& theFbo)
2467 Handle(OpenGl_FrameBuffer) aFbo = myDefaultFbo;
2468 myDefaultFbo = theFbo;
2472 // =======================================================================
2473 // function : SetColor4fv
2475 // =======================================================================
2476 void OpenGl_Context::SetColor4fv (const OpenGl_Vec4& theColor)
2478 if (!myActiveProgram.IsNull())
2480 myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_COLOR), theColor);
2482 #if !defined(GL_ES_VERSION_2_0)
2483 else if (core11 != NULL)
2485 core11->glColor4fv (theColor.GetData());
2490 // =======================================================================
2491 // function : SetTypeOfLine
2493 // =======================================================================
2494 void OpenGl_Context::SetTypeOfLine (const Aspect_TypeOfLine theType,
2495 const Standard_ShortReal theFactor)
2497 Standard_Integer aPattern = 0xFFFF;
2500 case Aspect_TOL_DASH:
2505 case Aspect_TOL_DOT:
2510 case Aspect_TOL_DOTDASH:
2515 case Aspect_TOL_SOLID:
2520 case Aspect_TOL_USERDEFINED:
2527 if (!myActiveProgram.IsNull())
2529 myActiveProgram->SetUniform (this, "uPattern", aPattern);
2530 myActiveProgram->SetUniform (this, "uFactor", theFactor);
2534 #if !defined(GL_ES_VERSION_2_0)
2535 if (theType != Aspect_TOL_SOLID)
2540 gl2psEnable (GL2PS_LINE_STIPPLE);
2546 core11fwd->glEnable (GL_LINE_STIPPLE);
2548 core11->glLineStipple (static_cast<GLint> (theFactor),
2549 static_cast<GLushort> (aPattern));
2556 core11fwd->glDisable (GL_LINE_STIPPLE);
2562 gl2psDisable (GL2PS_LINE_STIPPLE);
2569 // =======================================================================
2570 // function : SetLineWidth
2572 // =======================================================================
2573 void OpenGl_Context::SetLineWidth (const Standard_ShortReal theWidth)
2577 // glLineWidth() is still defined within Core Profile, but has no effect with values != 1.0f
2578 core11fwd->glLineWidth (theWidth);
2583 gl2psLineWidth (theWidth);
2588 // =======================================================================
2589 // function : SetTextureMatrix
2591 // =======================================================================
2592 void OpenGl_Context::SetTextureMatrix (const Handle(Graphic3d_TextureParams)& theParams)
2594 if (theParams.IsNull())
2598 else if (!myActiveProgram.IsNull())
2600 const GLint aUniLoc = myActiveProgram->GetStateLocation (OpenGl_OCCT_TEXTURE_TRSF2D);
2601 if (aUniLoc == OpenGl_ShaderProgram::INVALID_LOCATION)
2606 // pack transformation parameters
2607 OpenGl_Vec4 aTrsf[2];
2608 aTrsf[0].xy() = theParams->Translation();
2609 aTrsf[0].zw() = theParams->Scale();
2610 aTrsf[1].x() = std::sin (-theParams->Rotation() * static_cast<float> (M_PI / 180.0));
2611 aTrsf[1].y() = std::cos (-theParams->Rotation() * static_cast<float> (M_PI / 180.0));
2612 myActiveProgram->SetUniform (this, aUniLoc, 2, aTrsf);
2616 #if !defined(GL_ES_VERSION_2_0)
2619 GLint aMatrixMode = GL_TEXTURE;
2620 ::glGetIntegerv (GL_MATRIX_MODE, &aMatrixMode);
2622 core11->glMatrixMode (GL_TEXTURE);
2623 OpenGl_Mat4 aTextureMat;
2624 const Graphic3d_Vec2& aScale = theParams->Scale();
2625 const Graphic3d_Vec2& aTrans = theParams->Translation();
2626 Graphic3d_TransformUtils::Scale (aTextureMat, aScale.x(), aScale.y(), 1.0f);
2627 Graphic3d_TransformUtils::Translate (aTextureMat, -aTrans.x(), -aTrans.y(), 0.0f);
2628 Graphic3d_TransformUtils::Rotate (aTextureMat, -theParams->Rotation(), 0.0f, 0.0f, 1.0f);
2629 core11->glLoadMatrixf (aTextureMat);
2630 core11->glMatrixMode (aMatrixMode);
2635 // =======================================================================
2636 // function : SetPointSize
2638 // =======================================================================
2639 void OpenGl_Context::SetPointSize (const Standard_ShortReal theSize)
2641 if (!myActiveProgram.IsNull())
2643 myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_POINT_SIZE), theSize);
2644 #if !defined(GL_ES_VERSION_2_0)
2645 //myContext->core11fwd->glEnable (GL_VERTEX_PROGRAM_POINT_SIZE);
2648 #if !defined(GL_ES_VERSION_2_0)
2651 core11fwd->glPointSize (theSize);
2652 if (core20fwd != NULL)
2654 //myContext->core11fwd->glDisable (GL_VERTEX_PROGRAM_POINT_SIZE);
2660 // =======================================================================
2661 // function : SetGlNormalizeEnabled
2663 // =======================================================================
2664 Standard_Boolean OpenGl_Context::SetGlNormalizeEnabled (Standard_Boolean isEnabled)
2666 if (isEnabled == myIsGlNormalizeEnabled)
2668 return myIsGlNormalizeEnabled;
2671 Standard_Boolean anOldGlNormalize = myIsGlNormalizeEnabled;
2673 myIsGlNormalizeEnabled = isEnabled;
2675 #if !defined(GL_ES_VERSION_2_0)
2680 ::glEnable (GL_NORMALIZE);
2684 ::glDisable (GL_NORMALIZE);
2689 return anOldGlNormalize;
2692 // =======================================================================
2693 // function : ApplyModelWorldMatrix
2695 // =======================================================================
2696 void OpenGl_Context::ApplyModelWorldMatrix()
2698 #if !defined(GL_ES_VERSION_2_0)
2701 core11->glMatrixMode (GL_MODELVIEW);
2702 core11->glLoadMatrixf (ModelWorldState.Current());
2706 if (!myShaderManager->IsEmpty())
2708 myShaderManager->UpdateModelWorldStateTo (ModelWorldState.Current());
2712 // =======================================================================
2713 // function : ApplyWorldViewMatrix
2715 // =======================================================================
2716 void OpenGl_Context::ApplyWorldViewMatrix()
2718 #if !defined(GL_ES_VERSION_2_0)
2721 core11->glMatrixMode (GL_MODELVIEW);
2722 core11->glLoadMatrixf (WorldViewState.Current());
2726 if (!myShaderManager->IsEmpty())
2728 myShaderManager->UpdateWorldViewStateTo (WorldViewState.Current());
2732 // =======================================================================
2733 // function : ApplyModelViewMatrix
2735 // =======================================================================
2736 void OpenGl_Context::ApplyModelViewMatrix()
2738 #if !defined(GL_ES_VERSION_2_0)
2741 OpenGl_Mat4 aModelView = WorldViewState.Current() * ModelWorldState.Current();
2742 core11->glMatrixMode (GL_MODELVIEW);
2743 core11->glLoadMatrixf (aModelView.GetData());
2747 if (!myShaderManager->IsEmpty())
2749 myShaderManager->UpdateModelWorldStateTo (ModelWorldState.Current());
2750 myShaderManager->UpdateWorldViewStateTo (WorldViewState.Current());
2754 // =======================================================================
2755 // function : ApplyProjectionMatrix
2757 // =======================================================================
2758 void OpenGl_Context::ApplyProjectionMatrix()
2760 #if !defined(GL_ES_VERSION_2_0)
2763 core11->glMatrixMode (GL_PROJECTION);
2764 core11->glLoadMatrixf (ProjectionState.Current().GetData());
2768 if (!myShaderManager->IsEmpty())
2770 myShaderManager->UpdateProjectionStateTo (ProjectionState.Current());
2775 // =======================================================================
2776 // function : EnableFeatures
2778 // =======================================================================
2779 void OpenGl_Context::EnableFeatures() const
2784 // =======================================================================
2785 // function : DisableFeatures
2787 // =======================================================================
2788 void OpenGl_Context::DisableFeatures() const
2790 #if !defined(GL_ES_VERSION_2_0)
2791 glPixelTransferi (GL_MAP_COLOR, GL_FALSE);
2795 * Disable stuff that's likely to slow down glDrawPixels.
2796 * (Omit as much of this as possible, when you know in advance
2797 * that the OpenGL state will already be set correctly.)
2799 glDisable(GL_DITHER);
2800 glDisable(GL_BLEND);
2801 glDisable(GL_DEPTH_TEST);
2802 glDisable(GL_TEXTURE_2D);
2803 glDisable(GL_STENCIL_TEST);
2805 #if !defined(GL_ES_VERSION_2_0)
2806 glDisable(GL_LIGHTING);
2807 glDisable(GL_ALPHA_TEST);
2809 glDisable(GL_LOGIC_OP);
2810 glDisable(GL_TEXTURE_1D);
2812 glPixelTransferi(GL_MAP_COLOR, GL_FALSE);
2813 glPixelTransferi(GL_RED_SCALE, 1);
2814 glPixelTransferi(GL_RED_BIAS, 0);
2815 glPixelTransferi(GL_GREEN_SCALE, 1);
2816 glPixelTransferi(GL_GREEN_BIAS, 0);
2817 glPixelTransferi(GL_BLUE_SCALE, 1);
2818 glPixelTransferi(GL_BLUE_BIAS, 0);
2819 glPixelTransferi(GL_ALPHA_SCALE, 1);
2820 glPixelTransferi(GL_ALPHA_BIAS, 0);
2823 * Disable extensions that could slow down glDrawPixels.
2824 * (Actually, you should check for the presence of the proper
2825 * extension before making these calls. I've omitted that
2826 * code for simplicity.)
2829 if ((myGlVerMajor >= 1) && (myGlVerMinor >= 2))
2831 #ifdef GL_EXT_convolution
2832 if (CheckExtension ("GL_CONVOLUTION_1D_EXT"))
2833 glDisable(GL_CONVOLUTION_1D_EXT);
2835 if (CheckExtension ("GL_CONVOLUTION_2D_EXT"))
2836 glDisable(GL_CONVOLUTION_2D_EXT);
2838 if (CheckExtension ("GL_SEPARABLE_2D_EXT"))
2839 glDisable(GL_SEPARABLE_2D_EXT);
2842 #ifdef GL_EXT_histogram
2843 if (CheckExtension ("GL_SEPARABLE_2D_EXT"))
2844 glDisable(GL_HISTOGRAM_EXT);
2846 if (CheckExtension ("GL_MINMAX_EXT"))
2847 glDisable(GL_MINMAX_EXT);
2850 #ifdef GL_EXT_texture3D
2851 if (CheckExtension ("GL_TEXTURE_3D_EXT"))
2852 glDisable(GL_TEXTURE_3D_EXT);